Malicious PDF — malware analysis report

Static analysis result for SHA-256 4928611791bc4941…

MALICIOUS

PDF

84.3 KB Created: 2021-03-02 00:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: eda39c2680afc8911c4650c38aee44b9 SHA-1: bc0834703b9fd32935a7d42ed4cdf024705f05c6 SHA-256: 4928611791bc4941699c8e4ed8cfd967b208e8529100394368872448c6b113b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/strik?utm_term=doctor+sleep+novel+sequel PDF link annotation
    • https://cdn.sqhk.co/lopovekis/jhjatjc/free_download_cartoon_craft_mod_apk.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/xitisujoruxanadatijasi.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/62023316177.pdfIn PDF document text
    • http://zakilifawurafed.22web.org/47128862216.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/candidiasis_cronica_tratamiento_farmacologicofxfod.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/kokhfng/geometry_dash_master_dual.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/how_to_clean_a_broan_range_hood_filter.pdfIn PDF document text
    • https://cdn.sqhk.co/nafadurip/ZkJibia/worldedit_minecraft_download_1._16._3.pdfIn PDF document text
    • http://meziradidanaru.iblogger.org/sony_a6500_vs_a6400_for_video.pdfIn PDF document text
    • http://1pokypki.website/elements_of_art_definition_of_shapevpyix.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/pumped_up_kicks_piano_sheet_music.pdfIn PDF document text
    • http://kersita.fun/what_is_my_spiritual_authoritynkr9v.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/Xxb2xjd/lafoxomitigudotog.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/book_of_jasher_in_tamil.pdfIn PDF document text
    • http://purpless.vip/25220035583ebpnq.pdfIn PDF document text
    • http://reduslim-shopufficiale.site/96562100043wzt6s.pdfIn PDF document text
    • http://islemleriniz.org/2006_honda_rancher_350_es_oil_changejh5uq.pdfIn PDF document text
    • https://cdn.sqhk.co/rijujonakuje/RgfidSi/lalinonuvowukugad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futikuzita.onlinewebshop.net/75816274959.pdfIn PDF document text
    • http://femikadin.epizy.com/karyotyping_activity_worksheet_answer_key.pdfIn PDF document text
    • http://ronogaso.rf.gd/66024555810.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/pablo_neruda_poetry_themes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 4900 bytes
SHA-256: b704dfca7d1aabbb3a285922d288b32ccc3c01fe138ed8419a28b1776ef0b693
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 11424 bytes
SHA-256: 083f5494b24cafd70406b48d4aeec671aa7a3dd0629d27178428d8a1a6fdb506

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